Nancy Friedrich

Microwaves & RF

Nancy Friedrich began her career in technical publishing in 1998. After a stint with sister publication Electronic Design as Chief Copy Editor, Nancy worked as Managing Editor of Embedded Systems Development. She then became a Technology Editor at Wireless Systems Design, an offshoot of Microwaves & RF. Nancy has called the microwave space “home” since 2005.

Microstrip Patch Antenna Populates CPW Stub With MEMS Capacitors
Using radio-frequency microelectromechanical-systems (MEMS) technology, a tunable frequency microstrip patch antenna has been developed. It consists of a patch antenna loaded with a coplanar-waveguide (CPW) loading section, which is attached to ...
Software Eases Design Pain At Various Stages
Although simulation remains essential, many software platforms offer an increasing number of capabilities for specific RF design problems and challenges.
Microwaves Determine Pregnancy Through Urine Analysis
Shortly after conception, the human chorionic gonadotropin (hCG) glycoprotein hormone is secreted by the developing placenta. During early gestational growth, hCG rises in concentration. As a result, hCH is an excellent marker for the early ...
UWB LNA Achieves Maximum Gain Of 13.5 dB From 1.85 To 10.2 GHz
Many researchers are evaluating Ultra Wideband's (UWB's) applicability for short-range, high-speed wireless communications. Yet these systems must first overcome a challenging building block: the low-noise amplifier (LNA). A UWB LNA was recently ...
Double-Balanced Wideband Mixers Cover 0.7 To 10 GHz
To satisfy GPS, telecommunication, radar, EW, and instrumentation applications, a family of wideband, double-balanced mixers has emerged. The monolithic-microwave integrated circuits (MMICs) cover the 0.7-to-10-GHz band. The CGY2180UH, CGY2181UH, and ...
MIMO System Achieves 108-Mb/s Data Rate Using 16-MHz Channel
Higher data rates can be achieved by using wider RF bandwidths. Yet those bandwidths reduce the number of users that can simultaneously be connected to the network. A number of technologies have emerged to resolve this issue. Recently, a fully integrated ...
5-V InGaP/GaAs Amplifiers Satisfy Broadband RF And IF
The quick evolution of next-generation communications is making system requirements increasingly complicated. The WJA broadband amplifier family was designed to exceed those requirements. The devices offer up to 20 dB of gain and output third-order ...
Microstrip Circulator Topology Boasts Rectangular Ferrite Region
Typical junction circulators are composed of ferrite material—usually circular, hexagonal, or triangular in shape—surrounded by a uniform dielectric. Microstrip traces are then patterned on top with ports emanating at equal intervals in the azimuthal ...
Fractal Electrodynamics Improves Kokh Antenna Bandwidth
In fractal electrodynamics, fractal geometry is combined with electromagnetic theory in order to investigate a new class of radiation, propagation, and scattering problems. When fractals are applied to antenna elements, the result is smaller resonant ...
Innovations Lead To Multi-Pronged Homeland Defense
To stay a step ahead of any threat, RF products and communications are securing points of entry, ports, airlines, and any other vulnerable spot.
Real-Time Spectrum Analyzers Handle Advanced Radar Measurements
Today's advanced radars are notoriously hard to test. Simply put, the radar is beyond the scope of most standard measurement equipment. To simplify diagnostic troubleshooting and production test for radar applications, Tektronix, Inc. (Beaverton, OR) has ...
Software-Defined Radios Place Stringent Demands On Test Equipment
Software-Defined Radios (SDRS) eliminate incompatibilities between the command and control radio systems of different armed-services branches. They also link the communications systems of allied and coalition forces, thereby helping these different ...
Economy Spectrum Analyzers Span 9 kHz To 20 GHz
In the past, less-costly microwave spectrum analysis came at the price of some performance. Yet the MS271xB family of microwave spectrum analyzers vows to provide high performance at an affordable price. The three models feature 1-Hz-to-3-MHz ...
100-W GaN-On-Si Transistor Targets WiMAX
The market for 2.5-GHz WiMAX solutions is growing rapidly, thereby inspiring a legion of new products. One example is a 28-V, 100-W gallium-nitride (GaN), high-electron mobility transistor (HEMT). The NPT25100 GaN-on-silicon (Si) power transistor is ...
TCXO Delivers Stability To 7 x 108
To satisfy applications that require excellent stability, almost no heat dissipation, and no warmup time, a microprocessor-controlled temperature-compensated crystal oscillator (TCXO) has been spawned. The T1220 offers oven-controlled-like ...
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